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  • Flux Reversal Free Splittable Stator Core Doubly Salient Permanent Magnet Motor
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Carlos N. Tanaka; Ivan E. Chabu

    This paper presents the polyphase doubly salient stationary permanent magnets motors with no magnetic flux reversal in the stator core as well as splittable stator core. Due to its high power and torque densities as well as efficiency gains due to losses reduction in the iron and in the drive through unipolar converters, this motor becomes an attractive option for several applications including electric

    更新日期:2020-06-09
  • Classifying User Experience based on the Intention to Communicate
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Silvana Vanesa Aciar; Magalie Ochs

    Experience mining is considered a substantial extension of opinion mining. Experience mining covers the description of all events that are related to the user's perception in the interaction with the object. There is information about the user`s experience that cannot be obtained with polarity analysis or sentiment analysis. The information obtained from those analyses is the positive or negative evaluation

    更新日期:2020-06-09
  • Design and Simulation of an Energy Storage System with Batteries Lead Acid and Lithium-Ion for an Electric Vehicle: Battery vs. Conduction Cycle Efficiency Analysis
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Gustavo Soares dos Santos; Francisco José Grandinetti; Rodrigo Augusto Rocha Alves; Wendell de Queiróz Lamas

    This work aimed to study and analyze the model of a conventional vehicle transformed into an electric vehicle self-sustaining, in this transformation process, the proposal was to simulate two proposals of energy storage system, being a bank with lead-acid batteries (Pb) and another bank with lithium-ion (Li-ion) batteries, considering three transmission options with different gear ratios. In this work

    更新日期:2020-06-09
  • Electrical Customer Profile Using Fuzzy Logic Theory
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Thays Abreu; Carlos Roberto Minussi; Mara L. M. Lopes; Uiliam Nelson L. Alves; Anna Diva P. Lotufo

    Considering the increasing electrical energy demand in residences, it is necessary to know the detailed pattern of electricity use, to change the behavior of the final consumer and to reduce the global consumption. Knowing the load curve profile in advance is very important for detecting the peaks and valleys to change habits of energy consumption, principally during periods when the prices are lower

    更新日期:2020-06-09
  • A PSO-BPSO Technique for Hybrid Power Generation System Sizing
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Omar Llerena-Pizarro; Nestor Proenza-Perez; Celso Eduardo Tuna; Jose Luz Silveira

    The Particle Swarm Optimization (PSO) algorithm has been widely used in the field of optimization mainly due to its easy implementation, robustness, fast convergence, and low computational cost. However, due to its continuous nature, the PSO cannot be applied directly to real-life problems such as hybrid energy generating systems (HEGS) sizing, which contain continuous and discrete decision variables

    更新日期:2020-06-09
  • Failure Detection on Electronic Systems Using Thermal Images and Metaheuristic Algorithms
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Gustavo R. Hernández; Mario A. Navarro; Noé Ortega-Sánchez; Diego Oliva; Marco Pérez-Cisneros

    Segmentation is considered an important part of image processing. There are commonly used segmentation techniques to improve the thresholding process, such as Otsu and Kapur. The use of these techniques allows us to find the regions of interest in an image by accurately grouping the pixel intensity levels. On the other hand, the use of thermal images makes it possible to obtain information about the

    更新日期:2020-06-09
  • Suspension Effect in Tip-over Stability and Steerability of Robots Moving on Sloping Terrains
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Jesús Marcey García Caicedo; Aldemar Bohórquez Rodríguez; Alex Antonio Valero Mora

    This article describes a model for a skid steer robot that quantifies the reaction forces between the wheels and the ground, which includes the effect of the passive suspension when the robot moves on flat and inclined terrains. In addition to the internal parameters of the suspension, this model included external parameters related to other components of robot and the robot-terrain relationship. With

    更新日期:2020-06-09
  • Implementation New Logical Nodes - BIOP and ELTR Based on IEC 61850
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Giancarlo de França Aguiar; Bárbara Cassia Xavier Cassins Aguiar; Humberto de Alencar Pizza Silva; Volmir Eugênio Wilhelm; José Aquiles Baesso Grimoni; Helena Maria Wilhelm

    Automation in power generation, distribution and transmission has advanced from a semi-automated to fully autonomous approach. This work presents some of the implementations of a transmission and distribution transformer monitoring model for the creation of a management system of these assets, whose topology was elaborated based on IEC 61850. The implementation incorporates the creation of two new

    更新日期:2020-06-09
  • Efficient Management of Ultrasound Images using Digital Watermarking
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Diana Nuñez-Ramirez; Manuel Cedillo-Hernandez; Mariko Nakano-Miyatake; Hector Perez-Meana

    Nowadays, the administration of medical images can be compromised by several information security issues. Among others, a first problem consists in authenticating the source that originated the medical image and verifying that it corresponds to the correct patient; a second problem is aimed to avoid detachment between an electronic patient record and its corresponding images. A promising solution is

    更新日期:2020-06-09
  • Encryption of RGB Images by Means of a Novel Cryptosystem using Elliptic Curves and Chaos
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Erick Armando Hernández Díaz; Héctor Manuel Pérez Meana; Víctor Manuel Silva García

    A new symmetric cryptosystem is proposed in this paper which will be used to carry out image encryption without compression. The proposed system has been developed to encrypt images in BMP format. A significant contribution of this investigation is the use of one solution point of a zero valued constant elliptic curve in order to generate a set of 15 encryption keys. On the other hand, using a differential

    更新日期:2020-06-09
  • Desired Trajectory following by Feedforward Anticipation
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Pedro Teppa-Garrán; Wilfred Vásquez

    This work presents a tracking method that is easy to design and implement. In particular, it is considered the tracking of a predefined trajectory whose temporal derivatives are known. This anticipated information of the desired reference signal allows, by employing a guaranteed dominant pole placement criterion, the formulation of a control law that uses the conventional feedback error compensation

    更新日期:2020-06-09
  • Monitoring of Industrial Electrical Equipment using IoT
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Marcos Aurélio Fabrício; Frank Herman Behrens; David Bianchini

    This article presents a monitoring system for industrial electrical equipment in a production line, aiming at real-time monitoring of its operational state, allowing machine management and early detection of deviations and failures. The system measures the effective current draw of the monitored equipment using sensors connected to a data concentrator module, which stores the data collected by these

    更新日期:2020-06-09
  • Automatic Code Generation for Language-Learning Applications
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Gabriel Sebastián; Ricardo Tesoriero; Jose A. Gallud

    Language-learning applications define exercises that are pedagogical tools to introduce new language concepts. The development of this type of applications is complex due to the diversity of language-learning methodologies, the variety of execution environments and the number of different technologies that can be used. This article proposes a complete Model-Driven Architecture (MDA) approach, from

    更新日期:2020-06-09
  • Technology and Gestaltism: A Robotic-Based Learning Aid Tool
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Jomar Monsores; Tania Regina Pinto Almeida; Laura Cristina Toledo Quadros; João Roberto Toledo Quadros

    With the objective to seeking a new educational approach, in which to due students to be into active protagonists of their academic life, this paper presents the design of a robotic teaching tool that was conceived from the use of techniques of Gestalt Therapy, so as to be a playful instrument of verification of learning. The relevance of the study is due to the fact of the conception of this tool

    更新日期:2020-06-09
  • Device for Cell Culture under Variable Mechanical Stress by Controlling Deformation on its Substrate
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Leonardo Casal; Élida Hermida; Camila Ruiz

    Mechanotransduction can enhance cell cultures when its substrate is subjected to dynamic strain. This paper presents the design and implementation of a device that applies variable mechanical stress on a flexible biocompatible substrate. An embedded system implements a closed-loop PID control that acts on a proportional valve, which regulates the negative pressure in a chamber, generated by a miniature

    更新日期:2020-06-09
  • Inclined Plane Test for Erosion of Polymeric Insulators under AC and DC Voltages
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Luiz Meyer; Renzo Pintarelli

    In this paper a study on effects of AC and DC dry band arcing on silicone rubber insulators surface is presented. The insulators tested are commercially available, having as their main material silicone rubber with alumina trihydrate as an additive. In addition to literature analysis, experiments were performed following the inclined plane test method described in the ASTM D2303. It was found that

    更新日期:2020-06-09
  • Microgrid System with Emulated PV Sources for Parallel and Intentional Islanding Operations
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Moacyr Brito; Marcos Alves; Carlos Canesin

    In view of the new challenges in the energetic scenario throughout the world, this paper proposes the experimental evaluation of an emulated photovoltaic micro-grid with local accumulation and capability to operate connected or islanded from the mains. The power system is composed by six single-phase inverters, three of them for islanded or grid-tie modes and other three only for grid-tie mode. For

    更新日期:2020-06-09
  • An Extended Kron Method for Power System Applications
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Bruno Souza; Leandro Araujo; Débora Penido

    Due to the greater detailing in distribution systems modeling, it is necessary the seek for reliable reduction methods that improve the simulation time, while maintaining the precision of the power flow solution. This work considers the efficient idea regarding Kron reduction and establishes a mathematically exact reduction method to explicitly eliminate buses without loads and generation connection

    更新日期:2020-06-09
  • AI techniques applied to diagnosis of vibrations failures in wind turbines
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Javier Vives; Eduardo Quiles; Emilio García

    Supervision and fault diagnosis in wind turbines using automatic learning techniques allow early detection of the degeneration of the components, as well as the detection and diagnosis of sudden failures. This contribution evaluates different machine learning methodologies to predict, detect and diagnose electrical and mechanical failures of wind turbines. An integrated monitoring and diagnostic system

    更新日期:2020-06-09
  • An assessment of MPEG-7 visual descriptors for images of maize plagues and diseases
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-06-09
    Jorge Manjarrez-Sachez

    Feature description is a fundamental process in the analysis of images for content-based retrieval and classification, among other tasks in which the image feature descriptor should have enough discriminative power to differentiate similar from dissimilar images according with a distance measure. Although several descriptors have been proposed for a variety of images, the challenge is their suitability

    更新日期:2020-06-09
  • Algorithm to Determine the Volume and Shape of Constant Orientation Workspace for a 2(3-RRPS) Parallel Robot
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Mario A. García-Murillo; Diego A. Núñez-Altamirano; Jaime Gallardo-Alvarado; Roger E. Sánchez-Alonso

    This article describes a geometrical method used to analyze the workspace for parallel robot 2(3-RRPS). The algorithm, implemented in a CAD software, determines the workspace for a constant orientation. Mechanical restrictions of the robot and its influence in the workspace are considered. Actuator stroke, angular stroke of the joints in the base, angular travel of the ball joints on the platform,

    更新日期:2020-05-25
  • Seizing Requirements Engineering Issues through Supervised Learning Techniques
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    María Guadalupe Gramajo; Luciana Ballejos; Mariel Ale

    In recent years, the popularity of machine learning techniques has grown due to the availability of larges volumes of data and the increased processing capacity of computers. Despite the inherent value of these techniques, few studies have attempted to summarize how machine learning algorithms, especially supervised learning have contributed to task automation and resolving challenges in Requirements

    更新日期:2020-05-25
  • Finding Good Compilation Plans: A Strategy to Enhance an Adaptive Optimization System
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Adriano Ferrari Cardoso; Caio Henrique Segawa Tonetti; Anderson Faustino da Silva

    An important component of virtual machines is the adaptive optimization system, which decides what methods to optimize and what compiler optimization set to enable. In this context, this paper presents the development of an auto-tuning adaptive optimization system (a strategy to find good compiler optimizations), in order to obtain the best possible performance; that is, the reduction of runtime. Such

    更新日期:2020-05-25
  • A Solution for Dynamic Management of User Profiles in IoT Environments
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Valderi Leithardt; Douglas Santos; Luis Silva; Felipe Viel; Cesar Zeferino; Jorge Silva

    Internet of Things (IoT) is an emerging area in which we expect to have billions of devices connected to the Internet by 2020. IoT applications can offer many benefits to environments, society, and the economy through the interconnection and cooperation of smart objects. However, there are many privacy challenges, such as authentication, authorization, and confidentiality of personal data. With this

    更新日期:2020-05-25
  • Low-Frequency Underwater Wireless Power Transfer: Maximum Efficiency Tracking Strategy
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Israel Filipe Lopes; Rodolfo Lacerda Valle; Gabriel Azevedo Fogli; André Augusto Ferreira; Pedro Gomes Barbosa

    This paper proposes a strategy to improve the efficiency of a low-frequency Wireless Power Transfer (WPT) system used to charge the battery of an Autonomous Underwater Vehicle (AUV) through an Inductive Power Transfer (IPT). The IPT system uses a Split-Core Transformer (SCT) to transfer power from the docking base to the AUV, without electric contact. Under gap variation, the efficiency is changed

    更新日期:2020-05-25
  • A Smoothing Optimization Approach Applied to the Supervised MDS Method
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Vinicius Layter Xavier; Maculan Nelson; José Francisco Moreira Pessanha

    This paper presents an efficient approach to the Supervised MDS method. This method handles the problems of data visualization, supervised classification and bipartite ranking. In order to overcome the non-differentiable nature of the Supervised MDS method, the mathematical formulation proposed in this work is based on the hyperbolic smoothing technique. The performance of the algorithm is evaluated

    更新日期:2020-05-25
  • Instance Genetic Selection for Fuzzy Rule-based Systems Optimization to Opinion Classification
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Tayane Leite Cerqueira; Fabiana Cristina Bertoni; Matheus Giovanni Pires

    Opinion Mining aims to identify people feelings about some item of interest based on content available on the Web, without the user having to find and read all the news about it. As opinions are related to feelings that are often described by imprecise terms, Fuzzy Systems appear as an alternative to treat the information subjectivity. An important task in developing Fuzzy Systems is define the rule

    更新日期:2020-05-25
  • Resource Allocation in f-OFDM Wireless Networks with Delay Estimation Using Service Curve and Envelope Process
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Marcus Vinícius Gonzaga Ferreira; Flávio Henrique Teles Vieira

    In this paper, a resource allocation algorithm for wireless communication systems is proposed, which considers the channel transmission quality and data delay. In the proposed approach, the delay value is estimated to decide on the allocation of available radio resources, aiming to reduce the system’s average delay. For the delay estimation, an approach involving concepts of Network Calculus such as

    更新日期:2020-05-25
  • Naturalistic Programming: Model and Implementation
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Oscar Pulido Prieto; Ulises Juárez Martínez

    Naturalistic programming is defined as a programming technique that uses abstractions whose expressiveness is close to natural languages. The objective is preserving as much as possible the needs of the client in their language, while the text of these needs is simultaneously the requirements specification and the program source code. Consequently, the goal of the naturalistic paradigm is reducing

    更新日期:2020-05-25
  • Automatic Evolution of Eco-Efficient Software Architectures with CVL Models
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    José Miguel Horcas; Mónica Pinto

    Resource sharing and mass storage in server farms provided by cloud platforms save huge amounts of energy. However, optimizing energy consumption at the server room is not enough, being desirable to perform energy optimization of cloud services at the application level. In cloud computing a tailored configuration of services is deployed for each client (tenant), requiring different energy consumption

    更新日期:2020-05-25
  • Transient stability constrained optimal power flow based on trajectory sensitivity for power dispatch of distributed synchronous generators
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Pablo Leandro Chen Wieler; Roman Kuiava; wagner Felipe Santana Souza

    This paper is focused on the transient stability constrained optimal power flow (TSC-OPF) problem and its application for determining the optimal dispatch of active and reactive powers of distributed synchronous generators. In order to deal with uncertainties related to the actual active and reactive load values and the network topology configuration, this paper proposes a TSC- OPF formulation that

    更新日期:2020-05-25
  • Visual Control Law Tuning Using the JADE Algorithm Applied to Leaf Detection and Cutting
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    José Guillermo Cebada Reyes; Petra Wiederhold; Pablo Sánchez Sánchez; Irineo Lorenzo López Cruz

    In the propagation of plant tissue in vitro it is necessary to obtain from the leaf a circular section cut. In order to achieve this type of cuts the visual feedback is used, allowing us to analyze the RGB planes to detect the green color and find the image centroid. In order to fulfill the cut objective a PD+ control is used with self-tuning based on the adaptive differential evolutionary algorithm

    更新日期:2020-05-25
  • BRAPT: A New Metric for Translation Evaluation Based on Psycholinguistic Perspectives
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Rafael Guimarães Rodrigues; Kaio Tavares Rodrigues; Rodrigo Reis Gomes; Lilian Ferrari; Eduardo Ogasawara; Gustavo Paiva Guedes

    There are some metrics to evaluate automatic text translations in the literature. However, the state-of-the-art of these metrics still has limitations. One of them is the dependence of an exact and ordered pairing of words for evaluating similarity among texts. Another, is the non-consideration of the semantics of the text in such comparison. Previous studies point out the need to analyze the semantics

    更新日期:2020-05-25
  • Applied Sensor Fusion: Tuning Parameters of CF and KF by means of Evolution Strategies
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Talysson M. O. Santos; Márcio F. S. Barroso; Rodrigo A. Ricco

    From the point of view of metrology, inertial sensors acting separately present undesirable performance in the measurement of angular position. In order to provide measurements with greater precision and accuracy, the measures of each of these sensors are typically fused by means of filters. The performance parameters of these filters are hard to tune and several works have been using exhaustive search

    更新日期:2020-05-25
  • Method Applied To Animal MonitoringThrough VANT Images
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Bruno Campos de Vasconcellos; José Pedro Pereira Trindade; Leandro Bochi da Silva Volk; Leonardo Bidese de Pinho

    One of the necessary demands in extensive livestock systems is the counting of animals in areas of tens of hectares, costly when carried out manually and locally. In this context, this work proposes and discusses the efficacy of a semi-autonomous, non-invasive method for remote identification of animals in the field, applicable to precision livestock systems. The method was conceived from an exploratory

    更新日期:2020-05-25
  • Satellite Remote Sensing of Forest Degradation using NDFI and the BFAST Algorithm
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Erith Muñoz; Alfonso Zozaya; Erik Lindquist

    In this paper, results related with the assessment of the capabilityto detect forest degradation by analyzing NDFI time series through the BFAST algorithm are presented. Recent studies have shown the potential of the BFAST algorithm applied to a time-series of satellite-derived spectral indices such as NDVI or EVI to detect unambiguous and subtle perturbations of the forest cover canopy both positive

    更新日期:2020-05-25
  • Design of electromagnetic band gap media based on crank-like chiral structures
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Ángel J. García-Collado; Gregorio J. Molina-Cuberos; Óscar Fernández Fernández; José Margineda Puigpelat

    A new EBG (Electromagnetic Band Gap) structure with chiral crank elements is presented and its effects on the electric field propagation along a microstrip line are analysed and compared with the effects produced by mushroom-type inclusions. Chiral crank inclusions are distributed along both sides of the strip and the corresponding results are compared with those obtained by other elements commonly

    更新日期:2020-05-25
  • Dynamic Adaptive Protection based on IEC 61850
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Vinicius Ferrari; Yona Lopes

    In electrical power systems, the overcurrent relays (ANSI/IEEE 50/51) are widely used for protection, and it is one of the main alternatives for identifying system faults. In radial systems supplied by a single source, protection and selectivity can be achieved using the traditional techniques based on time-current curves coordination. However, in a system with multiple sources and operational conditions

    更新日期:2020-05-25
  • Deep Neural Network Architecture: Application for Facial Expression Recognition
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Moises Garcia Villanueva; Salvador Ramirez Zavala

    There are great challenges to build a model or architecture in Deep Learning and integrate it into a real-time application. One of these challenges is the construction or acquisition of large quality datasets (thousands or millions of objects). Another one is to have great computing potential for the architecture learning process. Finally, efficient architectures are needed for the design of deep neural

    更新日期:2020-05-25
  • Evolutionary Approach for Automatic Generation of Multi-Objective Morphological Filters for Depth Images in Embedded Navigation Systems
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-25
    Antonio Miguel Batista Dourado; Emerson Carlos Pedrino

    The efforts spent on the development of assistive technologies has led researches to explore many existing techniques as computer vision, image processing, etc. and apply them as embedded solutions to help people with several types of disabilities, including visual impairment. Embedded navigation systems for visually impaired people (VIP) often use RGB-D cameras to retrieve depth information from surroundings

    更新日期:2020-05-25
  • A Literature Review on Embedded Systems
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Luciana De Micco; Fabian Luis Vargas; Pablo Ignacio Fierens

    Embedded system design is crucial for the development of industry, technology, and science, and it is an area that has significantly grown in recent years throughout Latin America, both in academia and in industry. Embedded System (ES) refers to electronic equipment with a computing core which, unlike a personal computer, is designed to meet a specific function and is usually optimized to satisfy strict

    更新日期:2020-05-04
  • Measurement of 4G LTE Cells with SDR Technology
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Diego Gutiérrez; Francisco Giménez; Carlos Zerbini; Guillermo Riva

    Today, measurements on wireless mobile systems require specific, high-cost instruments. This hinders both its access from academia for education and research, and its widespread use by service providers for optimization of their networks. To address these problems, we present and demonstrate choices for measurement of 4G LTE access networks through open-source Software Defined Radio (SDR) tools. As

    更新日期:2020-05-04
  • Extending SMS Service Coverage in Rural Areas by using LoRa Communication Technology
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Francisco Giménez; Carlos Zerbini; Guillermo Riva

    Mobile phone services are provided by operators in cities and along the roads in rural areas. In the last case, the coverage can reach a few kilometers far from the roads, depending on the available mobile technology. As a consequence, rural population have limited coverage or lack of message-based communication systems. In this work, we propose a solution based on low-power wide area network (LPWAN)

    更新日期:2020-05-04
  • Adaptive: An Adaptive Routing Protocol for Vehicle Delay-Tolerant Networks
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Rodrigo Freitas Silva

    The aim of this work is to propose a new routing protocol for a Delay-Tolerant Networks (DTN) called Adaptive. This protocol is based in predictable contacts concept and uses the history of meeting nodes to determine the best way to route and drop packets on network. The following performance metrics were used to evaluate the Adaptive: delivery rate, average delay and average number of hops. The Adaptive

    更新日期:2020-05-04
  • Implementing Cryptographic Pairings on ARM dual-core Processors
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Raudel Cuiman Márquez; Alejandro José Cabrera Sarmiento; Santiago Sánchez-Solano

    In this paper, we explore the parallelization capabilities of the ARM processing system embedded in a Zynq device for a software implementation of the optimal Ate pairing. First, the use of the NEON coprocessor was evaluated. It was found that on ARM v7 Cortex-A9 processors the computation of the optimal Ate pairing based on NEON does not perform better than an optimized ARM-assembly equivalent implementation

    更新日期:2020-05-04
  • Embedded tunable laser control for WDM optical communications systems
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Marvin Cristhiano Bustillos Barcaya; Gustavo Fabian Rinalde

    In this work we present the design, implementation and evaluation of an embedded control solution for a WDM tunable laser. A brief description of the tunable laser components and operation is given and the required hardware is proposed. The required temperature, power and wavelength controllers are designed placing great emphasis on response time. Additionally, we present the characteristics and configurations

    更新日期:2020-05-04
  • A Critical Embedded System Challenge: The FloripaSat-1 Mission
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Gabriel Mariano Marcelino; Sara Vega-Martinez; Laio Oriel Seman; Leonardo Kessler Slongo; Eduardo Augusto Bezerra

    CubeSats have been receiving special attention in recent years, mainly due to their agile development process, and also the low costs involved when compared to traditional satellites. In this context, this paper presents the critical embedded systems designed for FloripaSat-1, which is a complete CubeSat mission developed at UFSC, Brazil. The satellite's service module has three main subsystems, each

    更新日期:2020-05-04
  • Printed Circuit Board Design Methodology for Embedded Systems Targeting Space Applications
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Cezar Antonio Rigo; Laio Oriel Seman; Marcelo Daniel Berejuck; Eduardo Augusto Bezerra

    This paper presents an overview of the theory and main aspects involved in designing reliable printed circuit boards (PCB) for embedded systems to be used in space applications. To that end, the design and layout process of a satellite-oriented hardware architecture is described, along with an introductory text on PCB design theory, including high-speed signals, impedance control, and general good

    更新日期:2020-05-04
  • Dual-Antenna Dual-Band High Performance Cubesat-Compatible GPS Receiver
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Santiago Rodríguez; Javier G. García; Germán Scillone; Juan G. Díaz; Ernesto M. López; Ramón López La Valle

    Nanosatellites are revolutionizing the space industry allowing low-cost educational, scientific or commercial space missions. Among them, the CubeSats play a key role due to their standardization and increasingly use. As the CubeSat missions become more and more complex and challenging, so do their subsystems. In particular, the position, velocity and attitude of the satellite are commonly required

    更新日期:2020-05-04
  • Supervision system for emergency brake and traction-system isolation on train formations
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Ivan Mariano Di Vito; Pablo Martín Gomez; Ariel Lutenberg

    In the event of an emergency, railway safety systems typically work by isolating the traction-system and applying the emergency brake, causing logistic problems on the railway line where the train formation remains stopped. This paper presents the design of a supervision system that enables the train formation to be moved in a limited and controlled way to a repair workshop or to a safe place for dropping

    更新日期:2020-05-04
  • Modular system for the monitoring of railway signaling equipment
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Lucas Dórdolo; Santiago Germino; Gustavo Ramoscelli; Alejandro Permingeat; Carlos Mancón; Leandro Francucci; Adrián Laiuppa; Dario Baliña; Ariel Lutenberg

    This paper presents a modular system designed to solve some specific problems on the monitoring of railway signaling equipment. The addressed problems arose from the needs presented by Trenes Argentinos, the company which operates almost all passenger rail transport in Argentina. The developed solution is examined, consisting of an embedded system with its hardware and firmware architecture along with

    更新日期:2020-05-04
  • FPGA implementation of a critical railway interlocking system
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Menéndez Martín Nicolás; Larosa Facundo Santiago; Ghignone Ramiro Adrián; Álvarez Nicolás; Lutenberg Ariel

    An interlocking is a railway system that automatically controls that changes in routes are safely managed, avoidingtrain crashes and derailments. This article presents an analysis of the state of the art technology used in several commercial interlocking equipment. Based on this analysis, design and implementation of an interlocking system architecture in FPGA technology is proposed. Appropriate techniques

    更新日期:2020-05-04
  • Assessment of Noise Impact on Hybrid Adaptive Computational Intelligence Multisensor Data Fusion Applied to Real-Time UAV Autonomous Navigation
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Ângelo de Carvalho Paulino; Lamartine Nogueira Frutuoso Guimarães; Elcio Hideiti Shiguemori

    Recent work have successfully employed a low-cost Multisensor Data Fusion application based on Hybrid Adaptive Computational Intelligence (HACI) — the cascaded use of Fuzzy-based Computational Intelligence algorithms. The methodology has been shown able to improve considerably the accuracy of current positioning estimation systems for real-time Unmanned Aerial Vehicle (UAV) autonomous navigation —

    更新日期:2020-05-04
  • Environmental Monitoring using Embedded Systems on UAVs
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Esther Viridiana Vazquez-Carmona; Juan Irving Vasquez-Gomez; Juan Carlos Herrera-Lozada

    Nowadays, Earth is being affected by the greenhouse effect. A first step to improve the current situation is to track the involved variables under temporal and spatial sampling. In this paper, we propose an integrated system for monitoring the related greenhouse effect gasses and several environmental variables. The system has been designed to be mounted on an unmanned aerial vehicle to overcome the

    更新日期:2020-05-04
  • Low-Cost Image and Video Processing Using High-Performance Middleware in Single-board Computers with Open Internet Standards
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Carlos Alejandro Pérez; Mario Sergio Cleva; Diego Orlando Liska; Dominga Concepción Aquino; Claudio Rodrigues da Fonseca

    Image processing is becoming ubiquitous in many activities. This kind of systems use industry-standard libraries, such as OpenCV, and GPGPU techniques such as CUDA and OpenCL. Nowadays, these are being ported to many computing platforms, offering significant processing power even in devices with limited resources. However, the only model that is truly ubiquitous, is the web itself. Modern browsers

    更新日期:2020-05-04
  • A Light Implementation of a 3D Convolutional Network for Online Gesture Recognition
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Fabio Brandolt Baldissera; Fabian Luis Vargas

    With the advancement of machine learning techniques and the increased accessibility to computing power, Artificial Neural Networks (ANNs) have achieved state-of-the-art results in image classification and, most recently, in video classification. The possibility of gesture recognition from a video source enables a more natural non-contact human-machine interaction, immersion when interacting in virtual

    更新日期:2020-05-04
  • A Scalable Neuromorphic Architecture to Efficiently Compute Spatial Image Filtering of High Image Resolution and Size
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Marco Abarca; Giovanny Sanchez; Luis Garcia; Juan Gerardo Avalos; Thania Frias; Karina Toscano; Hector Perez-Meana

    In this work, we propose a spiking P neuron whichis capable of performing spatial filtering operations by using new variants of the spiking neural P systems, such as synaptic weights and rules on the synapses. The inclusion of these variants have allowed us to create a compact spiking P neuron with minimal number of synapses and low computational complexity of the spiking rules. In addition, we propose

    更新日期:2020-05-04
  • Isophote-based Low-Computing-Power Eye-Detection Embedded-System
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Cristian Emanuel Ordoñez; Eduardo Blotta; Juan Ignacio Pastore

    The eye tracking field is an area highly studied by different researchers. In addition, there are companies that offer commercial eye trackers, but they are usually economically restrictive. However, current technology allows to design embedded eye tracking systems, capable of running on low-cost hardware. This paper presents the implementation of a real-time eye-detection method that uses the properties

    更新日期:2020-05-04
  • FPGA Based Implementation of ImageZero Compression Algorithm
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Lucas Leiva; Martín Vázquez; Marcelo Tosini; Oscar Goñi; José Noguera

    The main goal of information compression is to achieve the greatest reduction possible of the volume of data. This action affects both storage and transmission. However, the most used algorithms have considerable latency and are not practical for real-world applications. In the image compression field, the situation is more complex because the resolutions are constantly increasing. Nowadays, it is

    更新日期:2020-05-04
  • Optimization of Electricity Distribution in Latin America by Using Embedded Systems
    IEEE Lat. Am. Trans. (IF 0.782) Pub Date : 2020-05-04
    Gonzalo Exequiel Alvarez; Juan Leonardo Sarli

    The processes regarding the generation, transmission and distribution of electricity are gaining interest at global level, due to the constant trend in increasing consumption. Because of this, significant sums are allocated for investments to improve the efficiency of these processes. However, there are a significant number of companies which, by virtue of their small scale and the problems inherent

    更新日期:2020-05-04
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